Initial commit: RHINE LAB · ANALYSIS OS：三维界面与动效实验（本仓库不含个人归档索引数据）

2026-09-19 13:04:56 +08:00
commit 3f422218a5
1098 changed files with 39410 additions and 0 deletions
@@ -0,0 +1,146 @@
+// Reproduce typing clicks from the user's local reference video.
+// node scripts/extract-typing-audio.mjs path/to/ffmpeg.exe
+// These short excerpts retain the source recording's provenance, not the score's license.
+import fs from "node:fs";
+import crypto from "node:crypto";
+import { execFileSync } from "node:child_process";
+const ffmpeg = process.argv[2],
+  video = fs.readdirSync(".").find((x) => x.endsWith(".mp4"));
+if (!ffmpeg || !video)
+  throw Error("A local reference MP4 and FFmpeg path are required");
+const rate = 48000,
+  start = 6.84,
+  seconds = 0.55;
+const bytes = execFileSync(
+  ffmpeg,
+  [
+    "-v",
+    "error",
+    "-ss",
+    String(start),
+    "-i",
+    video,
+    "-t",
+    String(seconds),
+    "-vn",
+    "-af",
+    "pan=mono|c0=0.5*c0+0.5*c1",
+    "-ar",
+    String(rate),
+    "-f",
+    "f32le",
+    "pipe:1",
+  ],
+  { maxBuffer: 1024 * 1024 },
+);
+const source = new Float32Array(
+  bytes.buffer,
+  bytes.byteOffset,
+  bytes.length / 4,
+);
+const cuts = [6.864, 6.906, 6.948],
+  duration = 0.038;
+const samples = cuts.map((time) =>
+  source.slice(
+    Math.round((time - start) * rate),
+    Math.round((time - start + duration) * rate),
+  ),
+);
+let peak = 0;
+for (const sample of samples) {
+  const dc = sample.reduce((sum, x) => sum + x, 0) / sample.length;
+  for (let i = 0; i < sample.length; i++) {
+    const fadeIn = Math.min(1, i / (rate * 0.00035)),
+      fadeOut = Math.min(1, (sample.length - 1 - i) / (rate * 0.0035));
+    sample[i] = (sample[i] - dc) * fadeIn * fadeOut;
+    peak = Math.max(peak, Math.abs(sample[i]));
+  }
+}
+// Shared gain preserves the three original clicks' relative accents.
+const gain = 0.3 / peak;
+const pcm = samples.map((sample) => {
+  const out = Buffer.alloc(sample.length * 2);
+  for (let i = 0; i < sample.length; i++)
+    out.writeInt16LE(Math.round(sample[i] * gain * 32767), i * 2);
+  return out;
+});
+fs.mkdirSync("public/audio", { recursive: true });
+function wav(data, file) {
+  const out = Buffer.alloc(44 + data.length);
+  out.write("RIFF");
+  out.writeUInt32LE(out.length - 8, 4);
+  out.write("WAVEfmt ", 8);
+  out.writeUInt32LE(16, 16);
+  out.writeUInt16LE(1, 20);
+  out.writeUInt16LE(1, 22);
+  out.writeUInt32LE(rate, 24);
+  out.writeUInt32LE(rate * 2, 28);
+  out.writeUInt16LE(2, 32);
+  out.writeUInt16LE(16, 34);
+  out.write("data", 36);
+  out.writeUInt32LE(data.length, 40);
+  data.copy(out, 44);
+  fs.writeFileSync(file, out);
+}
+// Review-only source excerpt. Uniform gain makes its level comparable to the rebuilt sequence.
+const referencePcm = Buffer.alloc(source.length * 2);
+for (let i = 0; i < source.length; i++)
+  referencePcm.writeInt16LE(
+    Math.round(Math.max(-1, Math.min(1, source[i] * gain * 0.2)) * 32767),
+    i * 2,
+  );
+wav(referencePcm, "reference/typing-original.wav");
+const preview = Buffer.alloc(rate * 2 * 2);
+const pulseTimes = [
+  0.02, 0.064, 0.108, 0.152, 0.2, 0.244, 0.288, 0.332, 0.38, 0.424, 0.468,
+  0.516, 1.02, 1.068, 1.116, 1.16, 1.208, 1.256, 1.304, 1.352,
+];
+pulseTimes.forEach((t, n) => {
+  const click = pcm[n % pcm.length],
+    offset = Math.round(t * rate);
+  for (let i = 0; i < click.length / 2; i++)
+    preview.writeInt16LE(
+      Math.round(click.readInt16LE(i * 2) * 0.2),
+      (offset + i) * 2,
+    );
+});
+wav(preview, "public/audio/typing-preview.wav");
+fs.writeFileSync(
+  "src/typing-samples.ts",
+  `// Generated by scripts/extract-typing-audio.mjs. Source provenance: public/audio/typing-source.json.\nexport const TYPING_SAMPLE_RATE = ${rate};\nexport const TYPING_PCM = ${JSON.stringify(
+    pcm.map((x) => x.toString("base64")),
+    null,
+    2,
+  )} as const;\n`,
+);
+const report = {
+  source: video,
+  sourceSha256: crypto
+    .createHash("sha256")
+    .update(fs.readFileSync(video))
+    .digest("hex"),
+  sampleRate: rate,
+  channels: 1,
+  cuts: cuts.map((start) => ({ start, end: +(start + duration).toFixed(3) })),
+  processing: {
+    dcRemoval: true,
+    fadeInMs: 0.35,
+    fadeOutMs: 3.5,
+    sharedGain: gain,
+    denoising: false,
+    pitchChange: false,
+  },
+  scope:
+    "Three short excerpts from user-provided reference. Not original synthesis; source rights remain with the original creators.",
+};
+fs.writeFileSync(
+  "public/audio/typing-source.json",
+  JSON.stringify(report, null, 2) + "\n",
+);
+console.log(
+  JSON.stringify(
+    { cuts: report.cuts, bytes: pcm.reduce((n, b) => n + b.length, 0), gain },
+    null,
+    2,
+  ),
+);